[INFO] cloning repository https://github.com/Abeeujah/wengrow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Abeeujah/wengrow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbeeujah%2Fwengrow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbeeujah%2Fwengrow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7043c8d4a8c3a8ad0ac8f5ef342dc3230defb911
[INFO] checking Abeeujah/wengrow against master#36b21637e93b038453924d3c66821089e71d8baa for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAbeeujah%2Fwengrow" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Abeeujah/wengrow
[INFO] finished tweaking git repo https://github.com/Abeeujah/wengrow
[INFO] tweaked toml for git repo https://github.com/Abeeujah/wengrow written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Abeeujah/wengrow on toolchain 36b21637e93b038453924d3c66821089e71d8baa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Abeeujah/wengrow already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49f0236381793cabd8a6666acbe2f3d908221b1588afc6e4e5a2d151638ee4f4
[INFO] running `Command { std: "docker" "start" "-a" "49f0236381793cabd8a6666acbe2f3d908221b1588afc6e4e5a2d151638ee4f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49f0236381793cabd8a6666acbe2f3d908221b1588afc6e4e5a2d151638ee4f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49f0236381793cabd8a6666acbe2f3d908221b1588afc6e4e5a2d151638ee4f4", kill_on_drop: false }`
[INFO] [stdout] 49f0236381793cabd8a6666acbe2f3d908221b1588afc6e4e5a2d151638ee4f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4df228187d4bbb5df48273748f6b77c1855d68a591583d6dafb3d8e4b235e86b
[INFO] running `Command { std: "docker" "start" "-a" "4df228187d4bbb5df48273748f6b77c1855d68a591583d6dafb3d8e4b235e86b", kill_on_drop: false }`
[INFO] [stderr]     Checking wengrow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `store`
[INFO] [stdout]   --> src/chapter_12.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut store = &mut [0, 1];
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/chapter_12.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut store = &mut [0, 1];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/chapter_12.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let mut temp = a + b;
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `store`
[INFO] [stdout]   --> src/chapter_12.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut store = &mut [0, 1];
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_store`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/chapter_12.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut store = &mut [0, 1];
[INFO] [stdout]    |         ----^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/chapter_12.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         let mut temp = a + b;
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `countdown` is never used
[INFO] [stdout]  --> src/chapter_10.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn countdown(n: u8) {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_countdown` is never used
[INFO] [stdout]   --> src/chapter_10.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn recursive_countdown(n: u8) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `factorial` is never used
[INFO] [stdout]   --> src/chapter_10.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn factorial(n: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_factorial` is never used
[INFO] [stdout]   --> src/chapter_10.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn recursive_factorial(n: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_find_directories` is never used
[INFO] [stdout]   --> src/chapter_10.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn recursive_find_directories(dir: &str) -> Result<(), std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum` is never used
[INFO] [stdout]   --> src/chapter_11.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn sum<T>(list: &[T]) -> T
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse_str` is never used
[INFO] [stdout]   --> src/chapter_11.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn reverse_str(word: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_x` is never used
[INFO] [stdout]   --> src/chapter_11.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn count_x(word: &str) -> usize {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `char_count` is never used
[INFO] [stdout]    --> src/chapter_11.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn char_count(words: &[&str]) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `even_only` is never used
[INFO] [stdout]    --> src/chapter_11.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | pub fn even_only<T>(numbers: &[T]) -> Vec<T>
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `x_index` is never used
[INFO] [stdout]    --> src/chapter_11.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 157 | pub fn x_index(word: &str) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_x_index` is never used
[INFO] [stdout]    --> src/chapter_11.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn recursive_x_index(word: &str, index: usize) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shortest_paths` is never used
[INFO] [stdout]    --> src/chapter_11.rs:173:8
[INFO] [stdout]     |
[INFO] [stdout] 173 | pub fn shortest_paths(rows: usize, cols: usize) -> u64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max` is never used
[INFO] [stdout]  --> src/chapter_12.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn max<T>(list: &[T]) -> Option<T>
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]   --> src/chapter_12.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn fib(n: u64) -> u64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib_memoized` is never used
[INFO] [stdout]   --> src/chapter_12.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn fib_memoized(n: u64, memo: &mut HashMap<u64, u64>) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_starts_with` is never used
[INFO] [stdout]   --> src/chapter_3.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn copy_starts_with<'a>(words: &[&str], start: char) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sample` is never used
[INFO] [stdout]   --> src/chapter_7.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn sample<T>(list: Vec<T>) -> Vec<T>
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `avg_celcius` is never used
[INFO] [stdout]   --> src/chapter_7.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn avg_celcius<T>(far_readings: Vec<T>) -> T
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `size_clothes` is never used
[INFO] [stdout]   --> src/chapter_7.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn size_clothes(clothes: Vec<&str>) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_ones` is never used
[INFO] [stdout]   --> src/chapter_7.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn count_ones(lists: &[&[i32]]) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_palindrome_not_idiomatic` is never used
[INFO] [stdout]    --> src/chapter_7.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn is_palindrome_not_idiomatic(word: &str) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hundred_sum` is never used
[INFO] [stdout]    --> src/chapter_7.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn hundred_sum<T>(list: &[T]) -> bool
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prods_nums_lists` is never used
[INFO] [stdout]    --> src/chapter_7.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn prods_nums_lists(nums: &[i32], list: &[i32]) -> Vec<i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_subset_crude` is never used
[INFO] [stdout]   --> src/chapter_8.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn is_subset_crude<T>(set: &[T], subset: &[T]) -> bool
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_subset` is never used
[INFO] [stdout]   --> src/chapter_8.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn is_subset<T>(set: &[T], subset: &[T]) -> bool
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_subset_one_liner` is never used
[INFO] [stdout]   --> src/chapter_8.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn is_subset_one_liner<T>(set: &[T], subset: &[T]) -> bool
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `intersection` is never used
[INFO] [stdout]   --> src/chapter_8.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn intersection<T>(first: &[T], second: &[T]) -> HashSet<T>
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `intersection_idiomatic` is never used
[INFO] [stdout]   --> src/chapter_8.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn intersection_idiomatic<T>(first: &[T], second: &[T]) -> HashSet<T>
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ret_first_duplicate` is never used
[INFO] [stdout]   --> src/chapter_8.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn ret_first_duplicate(word: &[char]) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `missing_letter` is never used
[INFO] [stdout]   --> src/chapter_8.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn missing_letter(word: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_non_duplicate` is never used
[INFO] [stdout]    --> src/chapter_8.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn first_non_duplicate(word: &str) -> Option<char> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_opening_brace` is never used
[INFO] [stdout]  --> src/chapter_9.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn is_opening_brace(brace: char) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_closing_brace` is never used
[INFO] [stdout]  --> src/chapter_9.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn is_closing_brace(brace: char) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_a_match` is never used
[INFO] [stdout]   --> src/chapter_9.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn is_a_match(opening: char, closing: char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lint` is never used
[INFO] [stdout]   --> src/chapter_9.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn lint(code: &str) -> Result<bool, String> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rev_str` is never used
[INFO] [stdout]   --> src/chapter_9.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn rev_str(word: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rev_str_idiomatic` is never used
[INFO] [stdout]   --> src/chapter_9.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn rev_str_idiomatic(word: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `countdown` is never used
[INFO] [stdout]  --> src/chapter_10.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn countdown(n: u8) {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_countdown` is never used
[INFO] [stdout]   --> src/chapter_10.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn recursive_countdown(n: u8) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `factorial` is never used
[INFO] [stdout]   --> src/chapter_10.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn factorial(n: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_factorial` is never used
[INFO] [stdout]   --> src/chapter_10.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn recursive_factorial(n: u64) -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_find_directories` is never used
[INFO] [stdout]   --> src/chapter_10.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn recursive_find_directories(dir: &str) -> Result<(), std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `double_array` is never used
[INFO] [stdout]  --> src/chapter_11.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn double_array<T>(list: &mut [T], index: usize) -> Vec<T>
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum` is never used
[INFO] [stdout]   --> src/chapter_11.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn sum<T>(list: &[T]) -> T
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_sum` is never used
[INFO] [stdout]   --> src/chapter_11.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn recursive_sum<T>(list: &[T]) -> T
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse_str` is never used
[INFO] [stdout]   --> src/chapter_11.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn reverse_str(word: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_reverse_str` is never used
[INFO] [stdout]   --> src/chapter_11.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn recursive_reverse_str(word: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_x` is never used
[INFO] [stdout]   --> src/chapter_11.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn count_x(word: &str) -> usize {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_count_x` is never used
[INFO] [stdout]   --> src/chapter_11.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn recursive_count_x(word: &str) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `number_of_paths` is never used
[INFO] [stdout]   --> src/chapter_11.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn number_of_paths(steps: i32) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `anagrams_of` is never used
[INFO] [stdout]   --> src/chapter_11.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub fn anagrams_of(string: &str) -> Vec<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `char_count` is never used
[INFO] [stdout]    --> src/chapter_11.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn char_count(words: &[&str]) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_char_count` is never used
[INFO] [stdout]    --> src/chapter_11.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | pub fn recursive_char_count(words: &[&str]) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `even_only` is never used
[INFO] [stdout]    --> src/chapter_11.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | pub fn even_only<T>(numbers: &[T]) -> Vec<T>
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_even_only` is never used
[INFO] [stdout]    --> src/chapter_11.rs:129:8
[INFO] [stdout]     |
[INFO] [stdout] 129 | pub fn recursive_even_only<T>(numbers: &[T]) -> Vec<T>
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trig_seq` is never used
[INFO] [stdout]    --> src/chapter_11.rs:148:8
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub fn trig_seq(n: u32) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `x_index` is never used
[INFO] [stdout]    --> src/chapter_11.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 157 | pub fn x_index(word: &str) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `recursive_x_index` is never used
[INFO] [stdout]    --> src/chapter_11.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn recursive_x_index(word: &str, index: usize) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shortest_paths` is never used
[INFO] [stdout]    --> src/chapter_11.rs:173:8
[INFO] [stdout]     |
[INFO] [stdout] 173 | pub fn shortest_paths(rows: usize, cols: usize) -> u64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max` is never used
[INFO] [stdout]  --> src/chapter_12.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn max<T>(list: &[T]) -> Option<T>
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]   --> src/chapter_12.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn fib(n: u64) -> u64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib_memoized` is never used
[INFO] [stdout]   --> src/chapter_12.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn fib_memoized(n: u64, memo: &mut HashMap<u64, u64>) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib_iter` is never used
[INFO] [stdout]   --> src/chapter_12.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn fib_iter(n: u64) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `linear_search` is never used
[INFO] [stdout]  --> src/chapter_2.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn linear_search<T>(haystack: &[T], needle: T) -> Option<usize>
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `binary_search` is never used
[INFO] [stdout]   --> src/chapter_2.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn binary_search<T>(haystack: &[T], needle: T) -> Option<usize>
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_prime` is never used
[INFO] [stdout]  --> src/chapter_3.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn is_prime(number: i32) -> bool {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_leap_year` is never used
[INFO] [stdout]   --> src/chapter_3.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn is_leap_year(year: u32) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_list` is never used
[INFO] [stdout]   --> src/chapter_3.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn sum_list<T>(list: Vec<T>) -> T
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `chess_board_spaces` is never used
[INFO] [stdout]   --> src/chapter_3.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn chess_board_spaces(grains: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copy_starts_with` is never used
[INFO] [stdout]   --> src/chapter_3.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn copy_starts_with<'a>(words: &[&str], start: char) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `list_median` is never used
[INFO] [stdout]   --> src/chapter_3.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn list_median(list: &[i32]) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_duplicate` is never used
[INFO] [stdout]  --> src/chapter_4.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn check_duplicate(list: &[i32]) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_greatest_number` is never used
[INFO] [stdout]   --> src/chapter_4.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn check_greatest_number(list: &[i32]) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bubble_sort` is never used
[INFO] [stdout]   --> src/chapter_4.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn bubble_sort<T>(mut list: Vec<T>) -> Vec<T>
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `selection_sort` is never used
[INFO] [stdout]  --> src/chapter_5.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn selection_sort<T>(mut list: Vec<T>) -> Vec<T>
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `insertion_sort` is never used
[INFO] [stdout]  --> src/chapter_6.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn insertion_sort<T>(mut list: Vec<T>) -> Vec<T>
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `intersection` is never used
[INFO] [stdout]   --> src/chapter_6.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn intersection<T>(list: Vec<T>, arr: Vec<T>) -> Vec<T>
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `contains_x` is never used
[INFO] [stdout]   --> src/chapter_6.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn contains_x(word: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `avg_of_even_numbers` is never used
[INFO] [stdout]  --> src/chapter_7.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn avg_of_even_numbers<T>(list: &[T]) -> Option<T>
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `word_builder` is never used
[INFO] [stdout]   --> src/chapter_7.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn word_builder(chars: &[char]) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sample` is never used
[INFO] [stdout]   --> src/chapter_7.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn sample<T>(list: Vec<T>) -> Vec<T>
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `avg_celcius` is never used
[INFO] [stdout]   --> src/chapter_7.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn avg_celcius<T>(far_readings: Vec<T>) -> T
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `size_clothes` is never used
[INFO] [stdout]   --> src/chapter_7.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn size_clothes(clothes: Vec<&str>) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_ones` is never used
[INFO] [stdout]   --> src/chapter_7.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn count_ones(lists: &[&[i32]]) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_palindrome` is never used
[INFO] [stdout]   --> src/chapter_7.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn is_palindrome(word: &str) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_palindrome_not_idiomatic` is never used
[INFO] [stdout]    --> src/chapter_7.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn is_palindrome_not_idiomatic(word: &str) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hundred_sum` is never used
[INFO] [stdout]    --> src/chapter_7.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn hundred_sum<T>(list: &[T]) -> bool
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prod_nums` is never used
[INFO] [stdout]    --> src/chapter_7.rs:132:4
[INFO] [stdout]     |
[INFO] [stdout] 132 | fn prod_nums(nums: &[i32]) -> Vec<i32> {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prods_nums_lists` is never used
[INFO] [stdout]    --> src/chapter_7.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn prods_nums_lists(nums: &[i32], list: &[i32]) -> Vec<i32> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_subset_crude` is never used
[INFO] [stdout]   --> src/chapter_8.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn is_subset_crude<T>(set: &[T], subset: &[T]) -> bool
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_subset` is never used
[INFO] [stdout]   --> src/chapter_8.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn is_subset<T>(set: &[T], subset: &[T]) -> bool
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_subset_one_liner` is never used
[INFO] [stdout]   --> src/chapter_8.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn is_subset_one_liner<T>(set: &[T], subset: &[T]) -> bool
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `intersection` is never used
[INFO] [stdout]   --> src/chapter_8.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn intersection<T>(first: &[T], second: &[T]) -> HashSet<T>
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `intersection_idiomatic` is never used
[INFO] [stdout]   --> src/chapter_8.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn intersection_idiomatic<T>(first: &[T], second: &[T]) -> HashSet<T>
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ret_first_duplicate` is never used
[INFO] [stdout]   --> src/chapter_8.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn ret_first_duplicate(word: &[char]) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `missing_letter` is never used
[INFO] [stdout]   --> src/chapter_8.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn missing_letter(word: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_non_duplicate` is never used
[INFO] [stdout]    --> src/chapter_8.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn first_non_duplicate(word: &str) -> Option<char> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_opening_brace` is never used
[INFO] [stdout]  --> src/chapter_9.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn is_opening_brace(brace: char) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_closing_brace` is never used
[INFO] [stdout]  --> src/chapter_9.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn is_closing_brace(brace: char) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_a_match` is never used
[INFO] [stdout]   --> src/chapter_9.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn is_a_match(opening: char, closing: char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lint` is never used
[INFO] [stdout]   --> src/chapter_9.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn lint(code: &str) -> Result<bool, String> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rev_str` is never used
[INFO] [stdout]   --> src/chapter_9.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn rev_str(word: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rev_str_idiomatic` is never used
[INFO] [stdout]   --> src/chapter_9.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn rev_str_idiomatic(word: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "4df228187d4bbb5df48273748f6b77c1855d68a591583d6dafb3d8e4b235e86b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4df228187d4bbb5df48273748f6b77c1855d68a591583d6dafb3d8e4b235e86b", kill_on_drop: false }`
[INFO] [stdout] 4df228187d4bbb5df48273748f6b77c1855d68a591583d6dafb3d8e4b235e86b
